FOAMED THERMAL INSULATOR AND THERMAL INSULATION BOX OBTAINED BY PACKING FOAMED THERMAL INSULATOR

摘要

PURPOSE: To ensure the quality of a foamed thermal insulator and insulation box for use in, e.g. a refrigerator or freezer and to contribute to the elimination of the environmental problem of the ozone layer depletion by improving the solubility of a low-boiling foaming agent comprising an HCFC or HFC in a polyol ingredient to thereby attain, e.g. a decrease in the thermal conductivity of the foam. ;CONSTITUTION: An organic polyisocyanate is mixed, under stirring, with a polyol ingredient containing 5-25% hydroxyl compound having a molecular structure of the formula, a foam stabilizer, a catalyst, and a low-boiling foaming agent comprising an HCFC or HFC and having a boiling point of -50 to 0°C. This mixture is foamed to obtain the title insulator. The title box is obtained by introducing the foamable mixture into the space between an inner box and an outer box and causing the mixture to foam and fill the space.;COPYRIGHT: (C)1993,JPO&Japio